No Lcd Operation - Oki OKIFAX4550 Maintenance Manual

7.2

No LCD Operation

Start
TIME on LCD?
Yes
Return to section 7.1
41309401TH Rev.4
No
AC power cord ON?
Yes
+5V SUB at Pin 12
of CN7 (MCNT)?
Yes
+5V SUB at Pin 6 and 7 of
CN1 (OPE UNIT)?
No
Check MCNT board and
the cable between MCNT
and OPE boards.
Note: 46F/R46 board for OKIFAX4550/OKIOFFICE87 is shown as MCNT.
No
Reconnect the AC
power cord.
No
Check MPW1446/1546,
MCNT
boards and their connectors.
Yes
Replace OPE UNIT (O4W).
Solved?
No
Replace MCNT
Solved?
No
Yes
Yes
Return to section 7.1
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